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Anastasia Vela updated KAFKA-6263: ---------------------------------- Labels: (was: needs-kip) > Expose metric for group metadata loading duration > ------------------------------------------------- > > Key: KAFKA-6263 > URL: https://issues.apache.org/jira/browse/KAFKA-6263 > Project: Kafka > Issue Type: Improvement > Reporter: Jason Gustafson > Assignee: Anastasia Vela > Priority: Major > > We have seen in several cases where the log cleaner either wasn't enabled or > had experienced some failure that __consumer_offsets partitions can grow > excessively. When one of these partitions changes leadership, the new > coordinator must load the offset cache from the start of the log, which can > take arbitrarily long depending on how large the partition has grown (we have > seen cases where it took hours). Catching this problem is not always easy > because the condition is rare and the symptom just tends to be a long period > of inactivity in the consumer group which gradually gets worse over time. It > may therefore be useful to have a broker metric for the load time so that it > can be monitored and potentially alerted on. Same thing goes for the > transaction log -- This message was sent by Atlassian JIRA (v7.6.3#76005)